All three of Manko’s manufacturing locations stock various types of annealed laminated glass and can provide custom annealed or heat treated laminated glass. Laminated glass is a safety glazing product that, when configured correctly, can be utilized to improve glazing fall-out protection, security, and sound control. This product may be used to meet current and future enforced IBC safety codes above walk ways and entrance areas. At each of its facilities, Manko has carried annealed laminated glass, available as a stock sheet, single lite, or in an insulated unit. In 2018, Manko began producing its own laminated glass with the purchase of a Glaston ProL Flat Glass Lamination Line. This line is located in Manko’s Manhattan, KS facility with product available to all Manko locations. With this process, Manko is able to provide custom laminated glass, either annealed or heat treated.
Stock laminated productsManko’s stock annealed laminated glass incorporates a plasticized polyvinyl butyral (PVB) interlayer, typically .030 in thickness, bonded between two pieces of annealed glass. Generally speaking, laminated glass with PVB interlayers is 75% to 100% as strong as annealed glass of the same thickness. However, when broken, the PVB interlayer provides support to help hold the glass in place, providing additional fall-out and penetration protection. For stock laminated options, click here to visit our standard stock by location page for product availability.
*Shown above is .060 PVB (upper) and .060 SentryGlas (lower)*
Custom laminated products
Laminates with Plasticized Polyvinyl Butyral (PVB) Interlayer
Per GANA*, Plasticized polyvinyl butyral (PVB) sheet is made from polyvinyl butyral resin, plasticizer and proprietary chemical additives that give the interlayer unique impact and retention properties when used to laminate glass and some plastic glazings together. Laminates with PVB are commonly used on the exterior of a building in an insulated unit or single lite with fully captured aluminum systems. This product cannot be used with silicone sealants. Depending on exterior conditions and glazing configurations, the glass may need to be heat treated. For interior applications, PVB laminated glass is commonly used as glazing for added protection, sound reduction (STC), or creative designs.
Laminates with SentryGlas ® (SGP)Per Kuraray**, SentryGlas ® (SGP) is chemically different from PVB, making it water resistant, clearer, and stronger. With its superior strength to traditionally laminated glass, SentryGlas ® set a new standard in strength for lamination and has continued to lead the industry. The SentryGlas ® interlayer is five times stronger and up to 100 times stiffer than conventional laminating materials. For exterior uses, this product can be used as either a single lite or insulated unit and is compatible with silicone sealant. For interior uses, SentryGlas ® is typically used in handrail applications where interlayer stiffness and durability are of importance. Because of its clarity it is also commonly used with low-iron glass to maximize glazing clarity.
Stock Interlayers AvailableClear PVB – .030, .060, .090
Tint PVB – .030 – 52% Bronze (comparable to ¼” bronze glass), 44% Grey (matches ¼” grey glass), 73% Light Blue/Green (matches ¼” green glass), 65% White, 80% White, 0% Diamond White, 0% Brilliant Black
Clear SGP – .060, .090, .120, .150, .180
Additional custom (non-stock) PVB colors are available, contact Manko for more information
- Minimum annealed laminated single lite or unit size: 6” x 6”
- Minimum heat treated laminated single lite or unit size: 6” x 20”
- Maximum overall thickness of a laminated single lite: 1 ½”
- If the glazing is heat-treated, a minimum of .060 interlayer is required
- Weight of the glass make-up can determine interlayer thickness
- If the glazing contains holes, SGP is required for handrails, PVB may be used in specific interior applications
- If the glazing is sloped, the inboard lite must be laminated glass, Manko recommends heat treated laminated glass
- If using a soft coat low-e product, specify what surface the soft coat is on. Soft coat against the interlayer will drastically reduce the glazing performance. Soft coat exposed to the air space will have similar performance numbers compared to monolithic soft coat
- For any acid etch, sandblast, or satin product, the textured surface must be exposed
- For any obscure pattern glass, the pattern must be exposed, and a minimum of .090 interlayer thickness used
- If laminating wire glass, Manko recommends using baroque, not misco
**Kuraray – Producer of SentryGlas ® and Trosifol™ products